UnExpected token Please help

I'm making a 2D shooter but I want the arm to rotate on my sprite. The Script I have has a few errors I can't find, Please help her's the script below.

public class ArmRotation : MonoBehaviour {

  public int rotationOffset = 0;
 
  // Update is called once per frame
  void Update () {
      Vector3 mousePos = Input.mousePosition;
      Vector3 pos = Camera.main.WorldToScreenPoint(transform.position);
      mousePos = mousePos - pos;
      transform.rotation = Quaternion.Euler(new Vector3(0, 0, Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg - rotationOffset));
  }

}